熱伝導：熱が物質を通じて伝わるプロセス。過熱蒸気は熱伝導によって周囲の物質に熱を効果的に伝えることができます。The purpose of this full method is usually to create the reliable value with the index. The value of divisor is 1 or less than a person so that is why the worth with the index is larger